@article{ELMA_1947__2_140469,
     author = {L. Kollros},
     title = {Solution d'un probl\`eme de {Steiner.}},
     journal = {Elemente der Mathematik},
     pages = {105--107},
     year = {1947},
     volume = {2},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1947__2_140469/}
}